I have a growl in 5th and 6th gears. i have 42000 miles on it. all stock, but a k&n. the noise started about 40000. i took it to the dealer and they heard the noise and call GM who told them that it was a "normal" noise and there were no problems with the trans. I have looked on this board and see several people have had the same problem. If you have had or are having this problem could you please let me know. i would like to go to GM with the info and try to get them to replace mine. I cant believe it is normal to have a noise start at 40000.
thank you..
thank you..